Contract Source Code (Solidity)

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•  contract MyWishEosRegister *
•    - function put(string _eosAccountName)
•    - function get(address _addr)
•    - function get()

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/**
 *Submitted for verification at Etherscan.io on 2018-09-18
*/

pragma solidity ^0.4.25;

contract MyWishEosRegister {
    event RegisterAdd(address indexed, string, bytes32);
    mapping(address => bytes32) private register;
    
    function put(string _eosAccountName) external {
        require(register[msg.sender] == 0, "address already bound");
        bytes memory byteString = bytes(_eosAccountName);
        require(byteString.length == 12, "worng length");

        for (uint i = 0; i < 12; i ++) {
            byte b = byteString[i];
            require((b >= 48 && b <= 53) || (b >= 97 && b <= 122), "wrong symbol");
        }
        bytes32 result;
        assembly {
            result := mload(add(byteString, 0x20))
        }
        register[msg.sender] = result;
        emit RegisterAdd(msg.sender, _eosAccountName, result);
    }

    
    function get(address _addr) public view returns (string memory result) {
        bytes32 eos = register[_addr];
        if (eos == 0) {
            return;
        }
        result = "............";
        assembly {
            mstore(add(result, 0x20), eos)
        }
    }

    
    function get() public view returns (string memory) {
        return get(msg.sender);
    }
}

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[{"constant":false,"inputs":[{"name":"_eosAccountName","type":"string"}],"name":"put","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"get","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"_addr","type":"address"}],"name":"get","outputs":[{"name":"result","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"anonymous":false,"inputs":[{"indexed":true,"name":"","type":"address"},{"indexed":false,"name":"","type":"string"},{"indexed":false,"name":"","type":"bytes32"}],"name":"RegisterAdd","type":"event"}]

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